Side brush



FIG. 1 is a top plan view of a side brush;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a top perspective view thereof; and,

FIG. 6 is a bottom perspective view thereof. 

CLAIM The ornamental design for a side brush, as shown and described. 